Dell U2711 on screen message?

So, I just got this message "Backlight time", what does it mean? And how to turn it off

Try the following from http://en.community.dell.com/support-forums/peripherals/f/3529/t/19377332

* Power off the monitor
* Disconnect the power cord from the monitor
* Disconnect all monitor cords from the PC (USB, DVI, VGA, DisplayPort, HDMI, etc.)
* While disconnected, press and hold the monitor power button down for 5 seconds
* Reconnect the DVI cord to the monitor and to the PC video card
* Reconnect the power cord to the monitor
* Power on the monitor if it does not power on by itself
* Power on the PC
* Press the monitor Input Source Select button and choose DVI
* Did the feature disappear?

I'll try that, but what is the reason of that message? The backlight needs replacement or its dying?

Thanx

Probably hit wrong button combo ?

the backlight time is essentially the time monitor turned on. 10k isn't really that much to worry.